WO2016148564A1 - Dispositif de perforation pour la fabrication de pastilles - Google Patents

Dispositif de perforation pour la fabrication de pastilles Download PDF

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Publication number
WO2016148564A1
WO2016148564A1 PCT/NL2016/050005 NL2016050005W WO2016148564A1 WO 2016148564 A1 WO2016148564 A1 WO 2016148564A1 NL 2016050005 W NL2016050005 W NL 2016050005W WO 2016148564 A1 WO2016148564 A1 WO 2016148564A1
Authority
WO
WIPO (PCT)
Prior art keywords
punching
heating
pinching
pinching portion
heating element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/NL2016/050005
Other languages
English (en)
Inventor
Gerrit DE GOOIJER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VMI Holland BV
Original Assignee
VMI Holland BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VMI Holland BV filed Critical VMI Holland BV
Publication of WO2016148564A1 publication Critical patent/WO2016148564A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with cutting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0208—Tissues; Wipes; Patches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3846—Cutting-out; Stamping-out cutting out discs or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4427—Cutters therefor; Dies therefor combining cutting and forming operations

Definitions

  • the invention relates to a punching device for manufacturing pads, in particular cosmetic or medical pads.
  • Known cosmetic and medical pads are typically made fully out of cotton.
  • the circumferential edges of the known pads are compressed with a punching device to stitch or seal the layers of the pad together and to form a circumferential stitch or seal.
  • This has worked fine for full cotton pads for many years.
  • pads manufactured with alternative materials such as synthetic fibers or a mixture of cotton and synthetic fibers.
  • These pads have a relatively high shape memory or resilience to deformation, such that after compression, the circumferential stitch or seal is not permanent and thus unreliable. The quality and consistency of the pads can no longer be ensured.
  • a significant increase in the compression force overloads to 120% of the normal compression force
  • this is generally not favorable to the lifespan of the punching device and its associated tooling.
  • the invention provides a punching device for manufacturing pads, in particular cosmetic or medical pads, wherein the punching device comprises a female die and a male die which are movable towards each other in a punching direction to punch out the pads, wherein the male die comprises a punching element and the female die comprises an orifice that is aligned with the punching element in the punching direction for receiving said punching element, wherein the female die is provided with a first cutting portion and a first pinching portion surrounding the orifice, wherein the male die is provided with a second cutting portion and a second pinching portion at the punching element, wherein the first cutting portion and the second cutting portion are opposite to each other in the punching direction and are arranged to interact in said punching direction for cutting out the pad and for forming a circumferential edge of the pad, wherein the first pinching portion and the second pinching portion are opposite to each other in the punching direction and are arranged to interact in said punching direction for compressing the cut-out pad to form a circumfer
  • the shape memory or resilience to deformation of the material of the cut-out pad can be reduced, thereby improving the reliability of the circumferential seal.
  • the invention is particularly useful when the pads comprise alternative, non-cotton material, such as synthetic fibers.
  • the bonds between the long-chain polymer molecules in the fibers can be effectively loosened by the heating. As the fibers cool down, they can hold their new shape, thereby reducing the memory effect of the fibers.
  • the at least one heating element comprises a first heating element for heating the first pinching portion surrounding the orifice in the female die.
  • the cut-out pad can thus be heated from at least the side of the female die.
  • the first heating element is arranged in thermal contact with the first pinching portion.
  • the first pinching portion can be heated by the first heating element, e.g. through direct contact with the first heating element.
  • the female die comprises a plate, wherein the orifice is positioned in the plate, wherein the first heating element is arranged in thermal contact with the plate for indirectly heating the first pinching portion of the orifice of the female die.
  • the plate By heating the plate, at least part of the heat transferred from the first heating element into the plate can be conductively transferred to the first pinching portion.
  • the at least one heating element comprises a second heating element for heating the second pinching portion of the punching element of the male die.
  • the cut-out pad can thus be heated from at least the side of the male die.
  • the second heating element is arranged in direct thermal contact with the second pinching portion.
  • the second pinching portion can be heated by the second heating element, e.g. through direct contact with the second heating element.
  • the female die comprises a plurality of orifices, each with a first cutting portion and a first pinching portion
  • the male die comprises a plurality of punching elements, each with a second cutting portion and a second pinching portion, wherein each of the plurality of punching elements is aligned above and interacts with one of the plurality of orifices in the punching direction, wherein the at least one heating element is arranged for heating at least the first pinching portions of the female die or the second pinching portions of the male die.
  • the punching device can simultaneously punch out a plurality of pads in a single stroke in the punching direction.
  • the at least one heating element comprises a plurality of first heating elements that are arranged in thermal contact with the first pinching portions surrounding the orifices of the female die for heating said first pinching portions.
  • the plurality of first heating elements can individually heat the first pinching portions .
  • the female die comprises a plate, wherein the plurality of orifices are positioned in the plate, wherein the at least one heating element comprises a first heating element that is arranged in thermal contact with the plate for indirectly heating the first pinching portions surrounding the orifices of the female die.
  • the first heating element can indirectly heat all of the first pinching portions in the plate.
  • the at least one heating element comprises a plurality of second heating elements that are arranged in thermal contact with the second pinching portions of the plurality of punching elements of the male die for heating said second pinching portions.
  • the plurality of second heating elements can individually heat the second pinching portions.
  • the punching device comprises a control unit that is operationally connected to the at least one heating element for setting the temperature of said at least one heating element.
  • the heating element can thus be controlled through manual or autonomous operation of the control unit.
  • control unit is operationally connected to both the first heating element and the second heating element for heating the first pinching portion and the second pinching portion simultaneously.
  • control unit is arranged for setting the temperature of the at least one heating element to a level at which the pad in use is heated to a temperature in the range of 40 to 200 degrees Celsius between the first pinching portion and the second pinching portion.
  • the aforementioned heat range can reduce the shape memory or resilience to deformation of the material of the cut-out pad, in particular in the event of the material comprising synthetic fibers.
  • control unit is arranged for setting the temperature of the at least one heating element to a level at which the pad in use is heated to a temperature of at least 200 degrees Celsius between the first pinching portion and the second pinching portion.
  • the aforementioned temperature can cause the synthetic fibers in the cut-out pad to change structure, melt and/or fuse together to form a more homogenous material at the circumferential seal.
  • the at least one heating element is a heating element of the electrical heater type or the fluid filled heat exchanger type. These types of heaters have proven to be particularly effective at transferring heat into the first pinching portion and the second pinching portion .
  • the invention provides a method for manufacturing pads, in particular cosmetic or medical pads, with the use of the aforementioned punching device, wherein the method comprises the step of heating at least the first pinching portion or the second pinching portion.
  • the shape memory or resilience to deformation of the material of the cut-out pad can be reduced, thereby improving the reliability of the circumferential seal.
  • the invention is particularly useful when the pads comprise alternative, non-cotton material, such as synthetic fibers.
  • the bonds between the long-chain polymer molecules in the fibers can be effectively loosened by the heating. As the fibers cool down, they can hold their new shape, thereby reducing the memory effect of the fibers.
  • the method further comprises the step of simultaneously heating the first pinching portion and the second pinching portion.
  • the distribution of the heat transferred into the cut-out pad between the first pinching portion and the second pinching portion can be more uniform.
  • the method comprises the step of heating the pad to a temperature in the range of 40 to 200 degrees Celsius between the first pinching portion and the second pinching portion.
  • the aforementioned heat range can reduce the shape memory or resilience to deformation of the material of the cut-out pad, in particular in the event of the material comprising synthetic fibers.
  • the method comprises the step of heating the pad to a temperature of at least 200 degrees Celsius between the first pinching portion and the second pinching portion.
  • the aforementioned relatively high temperature can cause the synthetic fibers in the cut-out pad to melt and fuse together to form a more homogenous material at the circumferential seal.
  • the pad comprises cotton, synthetic fibers or a combination of cotton and synthetic fibers.
  • the punching device and method according to the invention are effective in reducing the shape memory and/or resilience to deformation of pads of full cotton, but can be particularly effective when used in combination with pads comprising synthetic fibers .
  • the invention provides a pad, in particular a cosmetic or medical pad, comprising a main body that is delimited by a circumferential edge, wherein the pad comprises a circumferential seal at or near the circumferential edge, wherein the material of the pad at the circumferential seal is at least partly fused.
  • the pad which can be obtained by operating the aforementioned punching device in accordance with the steps of the aforementioned method, can be reliably sealed by fusing the material at the circumferential seal. Hence, the reliability of the circumferential seal of the resulting pad can be improved.
  • the pad comprises synthetic fibers.
  • the fusing can be particularly effective when the pad comprises synthetic fibers, which have long-chain polymer molecules, the bonds of which are loosened when subjected to heat. After the molecules have cooled down, they will hold their new shape, thereby reducing the memory effect of the fibers.
  • figure 1 shows an isometric view of a punching device for manufacturing pads according to the invention, with a male die and a female die;
  • figure 2 shows one of the pads manufactured with the punching device according to figure 1;
  • figure 3 shows a cross section of the male die and the female die according to the line III - III in figure 1.
  • Figure 1 shows a punching device 1 for manufacturing pads 9, in particular cosmetic or medical pads, according to an exemplary embodiment of the invention.
  • Each pad 9 is provided with a main body 90 comprising one or more plies or layers of cotton for the absorption and/or application of liquid or semi-solid substances.
  • the main body 90 is delimited by a circumferential edge 91.
  • the main body 90 of the pad 9 is disc-shaped, thus resulting in a substantially circular circumference at the circumferential edge 91.
  • the scope of the invention is however not limited to the disc-shaped pads 9.
  • the punching device 1 according to the invention can also be used to manufacture pads with oval, square, rectangular circumferences or even specials, e.g. so as to resemble geometrical or non-geometrical shapes.
  • the layers of the main body 90 are compressed by the punching device 1 at or near the circumferential edge 91 to form a stitch print or a circumferential seal 92.
  • the seal 92 can either be continuous (e.g. through stitching) or intermittent (e.g. through perforation), depending on the tooling that is used.
  • Known cosmetic and medical pads are typically made fully out of cotton.
  • the pad 9 as shown in figure 2 can be full cotton or, as in this example, may comprises an alternative material, for example synthetic fibers or a mixture of cotton and synthetic fibers.
  • the pads 9 made of the alternative material, in particular of the synthetic fibers or the mixture of cotton and synthetic fibers, have an even greater shape memory or resilience to deformation than the full cotton pads.
  • the punching device 1 aims at reliably sealing the layers of these pads 9 at a relatively low compression force.
  • the punching device 1 comprises a female die 2, a male die 3 and an actuator 4 for moving the female die 2 and the male die 3 towards each other in a punching direction P.
  • the male die 3 is arranged to interact with the female die 2 to stamp out or punch out the individual pads 9 from a number of superimposed sheets 93 (only partly shown in figure 1) that after the punching form the layers of the pads 9.
  • the female die 2 comprises a plate 20 for supporting the sheets between the female die 2 and the male die 3 in the punching direction P and a plurality of orifices 21 in the plate 20 facing towards the male die 3 for passively receiving the male die 3 in the punching direction P.
  • the female die 2 is provided with a first cutting portion 22 and a first pinching portion 23 surrounding the respective orifice 21.
  • the first cutting portion 22 is provided with a circumferential first cutting edge 24 corresponding to the desired circumferential edge 91 of the pad 9 to be manufactured.
  • the first pinching portion 23 is provided with a first pinching surface 25 extending circumferentially and radially within the first cutting edge 24 at the desired position of circumferential seal 92 of the pad 9 to be manufactured.
  • the male die 3 comprises a support member 30 and a plurality of punching elements 31 mounted to and suspended from the support member 30 in the punching direction P above the plurality of orifices 21 in the plate 20 of the female die 2.
  • Each of the plurality of punching elements 31 is aligned above and actively interacts with one of the plurality of orifices 21 in the punching direction P to cut out and pinch the pads 9 in a single stroke in the punching direction P.
  • the actuator 4 is arranged for actively moving the male die 3 towards the female die 2, while the female die 2 remains stationary.
  • the actuator 4 may be an eccentric drive (not shown and known per se) that reciprocally moves the male die 3 back and forth in the punching direction P with respect to the female die 2.
  • Each of the punching elements 31 comprises a second cutting portion 32 and a second pinching portion 33.
  • the second cutting portion 32 is provided with a circumferential second cutting edge 34 corresponding to the desired circumferential edge 91 of the pad 9 to be manufactured.
  • the second pinching portion 33 is provided with a second pinching surface 35 extending circumferentially within the second cutting edge 34 at the desired position of circumferential seal 92 of the pad 9 to be manufactured.
  • the cutting portions 22, 32 of the female die 2 and the male die 3 are arranged directly opposite to each other in the punching direction P and interact in said punching direction P to cut-out the pads 9 and to form the desired circumferential edge 91.
  • the pinching portions 23, 33 of the female die 2 and the male die 3 are arranged directly opposite to each other in the punching direction P and interact in said punching direction P to compress a region of the layers of the cut-out pad 9 at or near the circumferential edge 91 to form the circumferential seal 92.
  • the punching device 1 is provided with one or more heating elements 5 for heating the first pinching portions 23 of the female die 2 or the second pinching portions 33 of the male die 3, or both.
  • the one or more heating elements 5 are preferably of the electrical heater type or the fluid filled heat exchanger type.
  • the one or more heating elements 5 comprise a first heating element 51 that is arranged in a heat-exchange relationship or thermal contact with the plate 20 of the female die 2 for indirectly and/or conductively heating the plate 20, including all of the first pinching portions 23, to a set temperature.
  • the first heating element 51 is preferably plate-like and/or is in thermal contact across a substantial part or the entire surface area of the plate 20.
  • the punching device 1 may be provided with a plurality of first heating elements (not shown) which are arranged in thermal contact or direct thermal contact with the first pinching portions 23 for individually heating the first pinching portions 23.
  • the punching device 1 further or alternatively comprises a plurality of second heating elements 52 which are arranged in thermal contact with the second pinching portions 33 for individually heating the second pinching portions 33 to a set temperature.
  • the second heating elements 52 are coil-shaped electrical or fluid filled heating elements extending on the inside of the punching elements 31 and arranged in direct contact with second pinching portions 33 of the respective punching elements 31.
  • the punching device 1 is provided with a control unit 6 that is operationally connected to each of the one or more heating elements 5 to control the temperature of the first pinching portions 23 or the second pinching portions 33, or both.
  • the control unit 6 may be manually operated and/or can be arranged to operate autonomously based on a set of given parameters.
  • the control unit 6 is arranged for setting the temperature of the one or more heating elements 5 to a level at which the pad 9 is heated to a temperature in the range of forty (40) degrees Celsius and two-hundred (200) degrees Celsius.
  • control unit 6 can be arranged for setting the temperature of the one or more heating elements 5 to a level at which the pad 9 is heated to a temperature of at least two-hundred (200) degrees Celsius, or a temperature at which the synthetic fibers in the pad 9 will start to meld, thereby fusing the fibers together to form a more homogenous circumferential seal 92.
  • control unit 6 is arranged for heating both the female die 2 and the male die 3 simultaneously to transfer heat into the pad 9 from both the side of the female die 2 and the male die 3. This generates a more uniform distribution of the transferred heat through the layers of the pad 9 in the punching direction P.
  • control unit 6 can be arranged for activating the one or more first heating elements 51 in the female die 2 or the plurality of second heating elements 52 in the male die 3 only, thus transferring heat into the pads 9 only from the side of the female die 2 or the side of the male die 3, respectively.
  • the transfer of heat into the pads 9 reduces or eliminates the need to increase or overload the compression force of the punching device 1 in the punching direction P.
  • the pads 9 can be compressed between the pinching portions 23, 33 with a normal or even less than normal compression force, while still obtaining pads 9 with a reliable circumferential seal 92.
  • the punching device 1 and its tooling will thus have a longer lifespan and require less maintenance.
  • the invention relates to a punching device 1 and a method for manufacturing pads 9, wherein the punching device 1 comprises a female die 2 and a male die 3 which are movable towards each other in a punching direction P, wherein the male die 3 comprises a punching element 31 and the female die 2 comprises an orifice 21 that is aligned with the punching element 31 in the punching direction P, wherein the female die 2 is provided with a first cutting portion 22 and a first pinching portion 23, wherein the male die 3 is provided with a second cutting portion 32 and a second pinching portion 33, wherein the punching device 1 is further provided with at least one heating element 5 for heating at least the first pinching portion 23 or the second pinching portion 33.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Birds (AREA)
  • Biomedical Technology (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

La présente invention concerne un dispositif de perforation (1) et un procédé de fabrication de pastilles (9), lequel dispositif de perforation (1) comprend une matrice femelle (2) et une matrice mâle (3) qui sont mobiles l'une vers l'autre dans une direction de perforation, la matrice mâle (3) comprenant un élément de perforation (31) et la matrice femelle (2) comprenant un orifice (21) qui est aligné sur l'élément de perforation (31) dans la direction de perforation, la matrice femelle (2) étant dotée d'une première partie de découpe (22) et d'une première partie de pincement (23), la matrice mâle (3) étant dotée d'une seconde partie de découpe (32) et d'une seconde partie de pincement (33), le dispositif de perforation (1) étant en outre doté d'au moins un élément chauffant (5) pour chauffer au moins la première partie de pincement (23) ou la seconde partie de pincement (33).
PCT/NL2016/050005 2015-03-13 2016-01-05 Dispositif de perforation pour la fabrication de pastilles Ceased WO2016148564A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2014455 2015-03-13
NL2014455A NL2014455B1 (en) 2015-03-13 2015-03-13 Punching device for manufacturing pads.

Publications (1)

Publication Number Publication Date
WO2016148564A1 true WO2016148564A1 (fr) 2016-09-22

Family

ID=53051880

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2016/050005 Ceased WO2016148564A1 (fr) 2015-03-13 2016-01-05 Dispositif de perforation pour la fabrication de pastilles

Country Status (2)

Country Link
NL (1) NL2014455B1 (fr)
WO (1) WO2016148564A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1086220A (en) * 1965-04-29 1967-10-04 Ici Ltd Improved embossing tool
EP1228853A2 (fr) * 2001-02-06 2002-08-07 I.L.P.R.A. S.P.A. Dispositif pour le soudage de matériaux en feuilles
WO2009035316A1 (fr) * 2007-09-12 2009-03-19 Ebm Techniek B.V. Dispositif pour disques de cotton et son procédé de fabrication
EP2586578A1 (fr) * 2011-10-24 2013-05-01 Roweg Holding AG Dispositif et procédé destinés à fabriquer des tampons de coton hydrophile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1086220A (en) * 1965-04-29 1967-10-04 Ici Ltd Improved embossing tool
EP1228853A2 (fr) * 2001-02-06 2002-08-07 I.L.P.R.A. S.P.A. Dispositif pour le soudage de matériaux en feuilles
WO2009035316A1 (fr) * 2007-09-12 2009-03-19 Ebm Techniek B.V. Dispositif pour disques de cotton et son procédé de fabrication
EP2586578A1 (fr) * 2011-10-24 2013-05-01 Roweg Holding AG Dispositif et procédé destinés à fabriquer des tampons de coton hydrophile

Also Published As

Publication number Publication date
NL2014455B1 (en) 2016-10-13

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